Ron Graham explains the number which takes his name... See our other Graham's Number videos: http://bit.ly/G_Number More Ron Graham Videos: http://bit.ly/Ron_Graham More links & stuff in full description below ↓↓↓ Graham's Number (Numberphile T-Shirt): http://bit.ly/Grahams_T-Shirt See him discuss how big it is: http://youtu.be/GuigptwlVHo Extra footage here: http://youtu.be/rGWuimr5CGQ And our original Graham's Number video: http://youtu.be/XTeJ64KD5cg Support us on Patreon: http://www.patreon.com/numberphile NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: https://teespring.com/stores/numberphile Other merchandise: https://store.dftba.com/collections/numberphile

These episodes aim at introducing the viewer to the aesthetics of Indian Classical Music so as to make the genre more approachable to the common public. 1) Facts about harmonium + parts and functioning of the harmonium 2) The concept of dcales 3) The concept of shrutis (to know more about shrutis,visit my blog: http://appreciateindianmusic.blogspot.in/2014/07/shruti-and-other-sound-frequency.html )

Fingerstyle Arpeggios on the Guitar - The hard way! This week is going to be about working on my arpeggios. The picking style is unusual, but allows for long fluid patterns to be played, if you can get the picking right! Practice For the Week videos give you a real time view of what I'm playing and how I'm progressing week by week. Guitar Tips, Tricks, Lessons. New Content Every Week! SUBSCRIBE: http://www.youtube.com/SixStringsAttachedTV

Practice for the week this week is ascending and descending triplets. These kind of patterns are a great way of learning a scale, building finger dexterity and smoothness in your playing. They can also be used as phrases in improvisations. So well worth spending some time on. Give it a go! Guitar Tips, Tricks, Lessons. New Content Every Week! SUBSCRIBE: http://www.youtube.com/SixStringsAttachedTV

If you plan on eating your final product, you should buy high concentration (95%+) ethanol from the liqueur store. Using acetone is likely okay, but you never really know what contaminants there are in it. The followup to this video will be showing how the extract can be used to make some extremely potent pepper spray. ------------------------------------------------------------------------------- Merch - https://nilered.tv/store ------------------------------------------------------------------------------- Join the community: Patreon - https://www.patreon.com/nilered Discord - https://discord.com/invite/3BT6UHf NileRed Newsletter - https://nile.red/home#newsletter You can also find me here: Facebook - https://m.facebook.com/NileRed2 Instagram - https://m.instagram.com/nile.red Twitter - https://mobile.twitter.com/NileRed2 Nile talks about lab safety: https://youtu.be/ftACSEJ6DZA

The Cyrus Cylinder is one of the most famous objects to have survived from the ancient world. It was inscribed in Babylonian cuneiform on the orders of Persian King Cyrus the Great (559-530 BC) after he captured Babylon in 539 BC. The cylinder is often referred to as the first bill of human rights as it appears to encourage freedom of worship throughout the Persian Empire and to allow deported people to return to their homelands. It was found in Babylon in modern Iraq in 1879 during a British Museum excavation.

Short information update to my Short Circuit Johnny 5 project - Input-In have open-sourced their Johnny 5 CAD. Check out: https://www.facebook.com/inputinc https://www.youtube.com/user/J5GURU ① GENIUS No MacArthur grant yet. But while I’m still waiting by the phone for that call, maybe you might patronise me with your Patreon-age. Or, if you’re all out of digital cash just comment on one of my hilarious Instagram pics, pop me a Tweet or generally yell in my direction. Patreon: https://www.patreon.com/xrobots Instagram: https://www.instagram.com/xrobotsuk Facebook: https://www.facebook.com/xrobotsuk/ Twitter: https://twitter.com/xrobotsuk Huge thanks to my patrons, without whom my standard of living would drastically decline. Like, inside out Farm Foods bag decline. Plus a very special shoutout to Aleph Objects, Inc who keep me in LulzBot 3D printers and support me via Patreon. https://www.lulzbot.com/ Why not join my community, who are mostly made up of actual geniuses. There’s a Facebook group and everything: https://www.facebook.com/pg/xrobots.co.uk/community ② XROBOTS Former toy designer, current YouTube maker and general robotics, electrical and mechanical engineer, I’m a fan of doing it yourself and innovation by trial and error. My channel is where I share some of my useful and not-so-useful inventions, designs and maker advice. Iron Man is my go-to cosplay, and 3D printing can solve most issues - broken bolts, missing parts, world hunger, you name it. XRobots is the community around my content where you can get in touch, share tips and advice, and more build FAQs, schematics and designs are also available. ③ MUSIC AND SFX The majority of the music and SFX used in my videos is from Epidemic Sound http://share.epidemicsound.com/xrobots

Karen Ramirez teaches how to use a portable keyboard, including how to pick accompaniment rhythms, instruments for playing the melody, and using the music arranger features. Visit http://www.sacramentomusicgroup.com to see and purchase Karen's lesson books shown in the video.

Assembling and testing the super fast, super small Intel NUC Mini PC. Includes a few handy DIY tips. Links to all the items seen here: http://goo.gl/KmQh6b ------AFFLIATED LINKS/ADVERTISING NOTICE------- All links are Affiliated where possible. When you click on links to various merchants posted here and make a purchase, this can result in me earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network & Amazon. I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to AMAZON Sites (including, but not limited to Amazon US/UK/DE/ES/FR/NL/IT/CAN)

The BP exhibition Ming: 50 years that changed China At the British Museum, 18 September 2014 - 5 January 2015 http://www.britishmuseum.org/whats_on/exhibitions/ming.aspx

Ceremony of blessing for a display of a Maori meeting house in Living and Dying, the Wellcome Trust Gallery, at the British Museum. Video features Natasha McKinney, curator, George Nuku, artist, and Kateia Burrows, Ngati Porou, Aitutaki. Speakers in the ceremony: Karl Burrows, Ngati Maru, Te Ati Awa, Whanganui.

out now! on lolipop records... Guy Blakeslee - "Ophelia Slowly" (CASS) HYPNOTIZING, DRAMATIC DREAM-POP PERFECTION!!! FROM THE LIVING LEGEND HIMSELF!!! GUY BLAKESLEE, OF THE ENTRANCE BAND & BEYOND!!! OUT NOW, ON LOLIPOP RECS!!! 300 clear/black cassettes pressed www.lolipoprecords.com -uploaded in HD at http://www.TunesToTube.com

In this radio commentary, Bill tells the story of the origins of an engineering marvel found at every amusement park, the Ferris Wheel. This radio piece was first broadcast February 15, 2005. Visit this link to view complete list of media attributions http://goo.gl/fmGESM.

Playwright, author and British Museum trustee, Bonnie Greer celebrates the enduring beauty and humanity of the Parthenon Sculptures. The Parthenon was built as a temple dedicated to the goddess Athena. It was the centrepiece of an ambitious building programme on the Acropolis of Athens. The temple's great size and lavish use of white marble was intended to show off the city's power and wealth at the height of its empire.

This is part 4 of my 3D printed Alien Xenomorph suit - working my way up the arm and shoulder. I'm using a Lulzbot TAZ to print the parts in ABS and Ninjaflex rubber. ① GENIUS No MacArthur grant yet. But while I’m still waiting by the phone for that call, maybe you might patronise me with your Patreon-age. Or, if you’re all out of digital cash just comment on one of my hilarious Instagram pics, pop me a Tweet or generally yell in my direction. Patreon: https://www.patreon.com/xrobots Instagram: https://www.instagram.com/xrobotsuk Facebook: https://www.facebook.com/xrobotsuk/ Twitter: https://twitter.com/xrobotsuk Huge thanks to my patrons, without whom my standard of living would drastically decline. Like, inside out Farm Foods bag decline. Plus a very special shoutout to Aleph Objects, Inc who keep me in LulzBot 3D printers and support me via Patreon. https://www.lulzbot.com/ Why not join my community, who are mostly made up of actual geniuses. There’s a Facebook group and everything: https://www.facebook.com/pg/xrobots.co.uk/community ② XROBOTS Former toy designer, current YouTube maker and general robotics, electrical and mechanical engineer, I’m a fan of doing it yourself and innovation by trial and error. My channel is where I share some of my useful and not-so-useful inventions, designs and maker advice. Iron Man is my go-to cosplay, and 3D printing can solve most issues - broken bolts, missing parts, world hunger, you name it. XRobots is the community around my content where you can get in touch, share tips and advice, and more build FAQs, schematics and designs are also available. ③ MUSIC AND SFX The majority of the music and SFX used in my videos is from Epidemic Sound http://share.epidemicsound.com/xrobots

Take a peek at my personal lab and bench.

TABLATURE HERE! http://www.guitarnick.com/malaika-easy-guitar-tab.html Learn how to play Malaika as sung by Miriam Makeba. Lots of progressive lessons and easy songs with free tabs, chords and videos on www.guitarnick.com

A simple technique based on the extended Pentatonic pattern. All I'm going to do this week is to focus on descending and ascending the scale in triplets. Come back in a week and see how I get on! Guitar Tips, Tricks, Lessons. New Content Every Week! SUBSCRIBE: http://www.youtube.com/SixStringsAttachedTV

An easy way of playing a scale on the guitar using natural harmonics. This is perfect for improvising with, whether you play the electric or acoustic guitar. Give it a go! Guitar Tips, Tricks, Lessons. New Content Every Week! SUBSCRIBE: http://www.youtube.com/SixStringsAttachedTV

Black Box gets my modified car through Emissions Test "AirCare" with ease. See what's inside and it's function.

Catch David on the Numberphile podcast: https://youtu.be/9y1BGvnTyQA Part one on odd polynomials: http://youtu.be/8l-La9HEUIU More links & stuff in full description below ↓↓↓ A nice extra bit about complex numbers: http://youtu.be/-IJuqR6nz_Q Professor David Eisenbud is an algebraic geometer (and director of the Mathematical Sciences Research Institute at Berkeley) Hello Internet: http://www.hellointernet.fm Support us on Patreon: http://www.patreon.com/numberphile NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: https://teespring.com/stores/numberphile Other merchandise: https://store.dftba.com/collections/numberphile

In this video we will be making glacial acetic acid from anhydrous sodium acetate. Note: I am going on vacation from July 8 for at least 2 months. So there will be limited video production. I have at least 10 videos to edit and release, which will be done once I return! ------------------------------------------------------------------------------- Merch - https://nilered.tv/store ------------------------------------------------------------------------------- Join the community: Patreon - https://www.patreon.com/nilered Discord - https://discord.com/invite/3BT6UHf NileRed Newsletter - https://nile.red/home#newsletter You can also find me here: Facebook - https://m.facebook.com/NileRed2 Instagram - https://m.instagram.com/nile.red Twitter - https://mobile.twitter.com/NileRed2 Nile talks about lab safety: https://youtu.be/ftACSEJ6DZA

Bill describes how the household drip coffee maker evolved. This was originally broadcast on August 29, 2000. Visit this link to view complete list of media attributions: http://goo.gl/fmGESM. Watch the related EngineerGuy video on how a drip coffee maker works: http://www.youtube.com/watch?v=4j4Q_YBRJEI

This is part 5 of my Iron Man Hulkbuster Cosplay - building remotely operating latches to lock the frame up. In this series, I build a complete Iron Man Hulkbuster cosplay with animatronics and mechatronics with a step-by-step guide to cover everything you’ll need to build your very own suit. From 3D printing the parts to installing the mechanics that make this whole suit wearable and actually able to walk around. ① GENIUS No MacArthur grant yet. But while I’m still waiting by the phone for that call, maybe you might patronise me with your Patreon-age. Or, if you’re all out of digital cash just comment on one of my hilarious Instagram pics, pop me a Tweet or generally yell in my direction. Patreon: https://www.patreon.com/xrobots Instagram: https://www.instagram.com/xrobotsuk Facebook: https://www.facebook.com/xrobotsuk/ Twitter: https://twitter.com/xrobotsuk Huge thanks to my patrons, without whom my standard of living would drastically decline. Like, inside out Farm Foods bag decline. Plus a very special shoutout to Aleph Objects, Inc who keep me in LulzBot 3D printers and support me via Patreon. https://www.lulzbot.com/ Why not join my community, who are mostly made up of actual geniuses. There’s a Facebook group and everything: https://www.facebook.com/pg/xrobots.c... ② XROBOTS Former toy designer, current YouTube maker and general robotics, electrical and mechanical engineer, I’m a fan of doing it yourself and innovation by trial and error. My channel is where I share some of my useful and not-so-useful inventions, designs and maker advice. Iron Man is my go-to cosplay, and 3D printing can solve most issues - broken bolts, missing parts, world hunger, you name it. XRobots is the community around my content where you can get in touch, share tips and advice, and more build FAQs, schematics and designs are also available. ③ MUSIC AND SFX The majority of the music and SFX used in my videos is from Epidemic Sound http://share.epidemicsound.com/xrobots

You can buy one here (UK) http://amzn.to/TObjfl Downloadable video samples available here: http://goo.gl/td3mSV ------AFFLIATED LINKS/ADVERTISING NOTICE------- All links are Affiliated where possible. When you click on links to various merchants posted here and make a purchase, this can result in me earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network & Amazon. I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to AMAZON Sites (including, but not limited to Amazon US/UK/DE/ES/FR/NL/IT/CAN)

TABLATURE HERE! http://www.guitarnick.com/tis-so-sweet-to-trust-in-jesus-fingerstyle-guitar-tablature.html Learn to play Tis So Sweet To Trust In Jesus in acoustic fingerstyle guitar arrangement with the free tablature on the site. You find lots of free accurate guitar tabs and songs on www.guitarnick.com

These episodes aim at introducing the viewer to the aesthetics of Indian Classical Music so as to make the genre more approachable to the common public. This episode talks about the concept of Saptak or octave: 1. Meaning of Saptak 2. Use in Indian Music 3. Saptak on tempered scale instruments (harmonium, keyboard, piano) 4. Saptak and vocal registers

See how to build a fire tornado machine with no moving parts, just cardboard, tape, and aluminum foil. This video is a single-take build of this design in less than a half hour!

What happens when the authority of the Church splits down the middle? For nearly 40 years, Europe was torn apart not by a theological heresy, but by a legal and political nightmare: the Great Western Schism. Following the return of the papacy to Rome from Avignon, a disastrous election in 1378 led to the unthinkable: two rival popes claiming absolute authority. In this video, we trace the chaos from the conclave in Rome to the diplomatic failures that eventually resulted in three men claiming the papal tiara at once. My books (affiliate links): "How We Got Our Bible" (Zondervan, 2018): https://amzn.to/2MtmSYY "Story of Creeds and Confessions" (Baker Academic, 2019): https://amzn.to/3OVDyGQ Support the channel on Patreon: https://patreon.com/user?u=23593673 For the courses, see the playlists: https://www.youtube.com/playlist?list=PLRgREWf4NFWY1ZaP-falnLFIR9texgvjR #catholic #history #medieval

Practice for the week - the results! This is a way of fingering the Pentatonic scale for maximum speed. Its not the easiest way to play it, and there are some horrendous stretches involved, but you can achieve some really interesting results with it. See how I get on with it! Guitar Tips, Tricks, Lessons. New Content Every Week! SUBSCRIBE: http://www.youtube.com/SixStringsAttachedTV

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M2_Browning The M2 Machine Gun or Browning .50 Caliber Machine Gun is a heavy machine gun designed towards the end of World War I by John Browning. It is very similar in design to Browning's earlier M1919 Browning machine gun, which was chambered for the .30-06 cartridge. The M2 uses the much larger and much more powerful .50 BMG cartridge, which was developed alongside and takes its name from the gun itself (BMG standing for Browning Machine Gun). The M2 has been referred to as "Ma Deuce", as a GI phonetic slang or "the fifty" in reference to its caliber. The design has had many specific designations; the official designation for the current infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible. It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications and low-flying aircraft. The M2 machine gun has been in production longer than any other machine gun. The Browning .50 caliber machine gun has been used extensively as a vehicle weapon and for aircraft armament by the United States from the 1930s to the present. It was heavily used during World War II, the Korean War, the Vietnam War, the Falklands War, and during the Iraq War and War in Afghanistan in the 2000s and 2010s. It is the primary heavy machine gun of NATO countries, and has been used by many other countries. The M2 has been in use longer than any other small arm in U.S. inventory except the .45 ACP M1911 pistol, also designed by John Browning. The current M2HB is manufactured in the United States by General Dynamics and U.S. Ordnance for use by the United States government, and for U.S. Foreign Allies via FMS sales. FN Herstal has manufactured the M2 machine gun since the 1930s.

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M2_Browning The M2 Machine Gun or Browning .50 Caliber Machine Gun is a heavy machine gun designed towards the end of World War I by John Browning. It is very similar in design to Browning's earlier M1919 Browning machine gun, which was chambered for the .30-06 cartridge. The M2 uses the much larger and much more powerful .50 BMG cartridge, which was developed alongside and takes its name from the gun itself (BMG standing for Browning Machine Gun). The M2 has been referred to as "Ma Deuce", as a GI phonetic slang or "the fifty" in reference to its caliber. The design has had many specific designations; the official designation for the current infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible. It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications and low-flying aircraft. The M2 machine gun has been in production longer than any other machine gun. The Browning .50 caliber machine gun has been used extensively as a vehicle weapon and for aircraft armament by the United States from the 1930s to the present. It was heavily used during World War II, the Korean War, the Vietnam War, the Falklands War, and during the Iraq War and War in Afghanistan in the 2000s and 2010s. It is the primary heavy machine gun of NATO countries, and has been used by many other countries. The M2 has been in use longer than any other small arm in U.S. inventory except the .45 ACP M1911 pistol, also designed by John Browning. The current M2HB is manufactured in the United States by General Dynamics and U.S. Ordnance for use by the United States government, and for U.S. Foreign Allies via FMS sales. FN Herstal has manufactured the M2 machine gun since the 1930s.

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/AT4 The AT4 (also variously AT-4, AT4 CS, AT4-CS, or AT-4CS) is an 84-mm unguided, portable, single-shot recoilless smoothbore weapon built in Sweden by Saab Bofors Dynamics (previously Bofors Anti-Armour Systems). Saab has had considerable sales success with the AT4, making it one of the most common light anti-tank weapons in the world. The designation "CS" represents "confined space" referring to the propellant charge being designed to operate effectively within buildings in an urban environment. It is intended to give infantry units a means to destroy or disable armoured vehicles and fortifications, although it is not generally sufficient to defeat a modern main battle tank (MBT). The launcher and projectile are manufactured prepacked and issued as a single unit of ammunition with the launcher discarded after a single use.

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/AT4 The AT4 (also variously AT-4, AT4 CS, AT4-CS, or AT-4CS) is an 84-mm unguided, portable, single-shot recoilless smoothbore weapon built in Sweden by Saab Bofors Dynamics (previously Bofors Anti-Armour Systems). Saab has had considerable sales success with the AT4, making it one of the most common light anti-tank weapons in the world. The designation "CS" represents "confined space" referring to the propellant charge being designed to operate effectively within buildings in an urban environment. It is intended to give infantry units a means to destroy or disable armoured vehicles and fortifications, although it is not generally sufficient to defeat a modern main battle tank (MBT). The launcher and projectile are manufactured prepacked and issued as a single unit of ammunition with the launcher discarded after a single use.

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/AT4 The AT4 (also variously AT-4, AT4 CS, AT4-CS, or AT-4CS) is an 84-mm unguided, portable, single-shot recoilless smoothbore weapon built in Sweden by Saab Bofors Dynamics (previously Bofors Anti-Armour Systems). Saab has had considerable sales success with the AT4, making it one of the most common light anti-tank weapons in the world. The designation "CS" represents "confined space" referring to the propellant charge being designed to operate effectively within buildings in an urban environment. It is intended to give infantry units a means to destroy or disable armoured vehicles and fortifications, although it is not generally sufficient to defeat a modern main battle tank (MBT). The launcher and projectile are manufactured prepacked and issued as a single unit of ammunition with the launcher discarded after a single use.

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Mk_19_grenade_launcher The Mk 19 is a belt fed, blowback operated, air cooled, crew served, fully automatic weapon that is designed not to cook off. It fires 40mm grenades at a cyclic rate of 325 to 375 rounds per minute, giving a practical rate of fire of 60 rounds per minute (rapid) and 40 rounds per minute (sustained). The weapon operates on the blowback principle, which uses the chamber pressure from each fired round to load and re-cock the weapon. The Mk 19 can launch its grenade at a maximum distance of 2,212 meters, though its effective range to a point target is about 1,500 meters, since the large rear leaf sight is only graduated to 1,500 meters. The nearest safe distance to launch the grenade is 310 meters in training and 75 meters in combat. Though the Mk 19 has a flash suppressor, it serves only to save the eyesight of its operator; it does not conceal the weapon's position. For night operation, an AN/TVS-5 night vision sight can be fitted. The Mk 19A man-portable crew-served weapon that can fire from a tripod mounted position or from a vehicle mount, with the latter being the preferred method as the weapon alone weighs 32.9 kilograms (72.5 lb). The primary ammunition for is the high-explosive dual-purpose M430 grenade. On impact, the grenade can kill anyone within the radius of five meters, and wound them within the radius of 15 meters. It can also punch through 5.1 centimetres (2 in) of rolled homogeneous armor with a direct hit (0 Degree Obliquity), which means it can penetrate most infantry fighting vehicles and armored personnel carriers. It is especially effective when used against enemy infantry formations. The ammunition comes in cans that hold a 32 or 48 grenades belt weighing 19 and 27 kilograms (42 and 60 lb), respectively. Due to its low recoil and comparatively light weight, it has been adapted for use on many different platforms, including small attack boats, fast attack vehicles such as the Humvee (HMMWV), AAV and Stryker, military jeeps and a large variety of naval mounts. The Mk 19 automatic grenade launcher replaced the earlier Mk 18 hand-cranked multiple grenade launcher. The 40 mm ammunition used (40x53mm) is not interchangeable with that used in the M203 (40x46mm). The M203 ammunition develops a lower chamber pressure, and resultant lower muzzle velocity and range, compared to ammunition loaded for the Mk-19. The Mk 19 fires from an open bolt. The rounds are mechanically fed onto the bolt face with the pull of the charging handles. When the trigger is pressed, the bolt closes, and the firing pin is released. The recoil blows back the bolt, feeds a new round onto the bolt face, which pushes the expended casing off the bolt face. Production of the Mk 19 is managed by Saco Defense Industries (now a division of General Dynamics Armament and Technical Products).

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M4_carbine The M4 carbine is a family of firearms that was derived from earlier carbine versions of the M16 rifle, which was in turn derived from the original AR-15 rifle that Eugene Stoner designed and ArmaLite manufactured. The M4 is a shorter and lighter variant of the M16A2 assault rifle. It is a gas-operated, magazine-fed, selective fire, shoulder-fired weapon with a telescoping stock and 14.5 in (370 mm) barrel to ease close quarters combat. Like the rest of the M16 family, it fires the .223 caliber, or 5.56 mm NATO round. The M4 has selective fire options including semi-automatic and three-round burst (like the M16A2 and M16A4), while the M4A1 has the capability to fire fully automatic instead of three-round burst (like the M16A1 and M16A3). The carbine is also capable of mounting an M203 grenade launcher (the M203A1 with a 9-inch barrel as opposed to the standard 12-inch barrel of the M203 used on the M16 series) as well as its successor, the M320 grenade launcher. The M4 carbine is heavily used by the U.S military. It will eventually replace the M16 rifle for most combat units in the United States Army. The winner of the Individual Carbine competition was to supplement the M4 carbine in U.S. Army service; all other services will continue using the M4 carbine and M16 rifles. The Army cancelled the Individual Carbine competition without selecting a replacement rifle and instead plans to equip soldiers with the improved M4A1

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M4_carbine The M4 carbine is a family of firearms that was derived from earlier carbine versions of the M16 rifle, which was in turn derived from the original AR-15 rifle that Eugene Stoner designed and ArmaLite manufactured. The M4 is a shorter and lighter variant of the M16A2 assault rifle. It is a gas-operated, magazine-fed, selective fire, shoulder-fired weapon with a telescoping stock and 14.5 in (370 mm) barrel to ease close quarters combat. Like the rest of the M16 family, it fires the .223 caliber, or 5.56 mm NATO round. The M4 has selective fire options including semi-automatic and three-round burst (like the M16A2 and M16A4), while the M4A1 has the capability to fire fully automatic instead of three-round burst (like the M16A1 and M16A3). The carbine is also capable of mounting an M203 grenade launcher (the M203A1 with a 9-inch barrel as opposed to the standard 12-inch barrel of the M203 used on the M16 series) as well as its successor, the M320 grenade launcher. The M4 carbine is heavily used by the U.S military. It will eventually replace the M16 rifle for most combat units in the United States Army. The winner of the Individual Carbine competition was to supplement the M4 carbine in U.S. Army service; all other services will continue using the M4 carbine and M16 rifles. The Army cancelled the Individual Carbine competition without selecting a replacement rifle and instead plans to equip soldiers with the improved M4A1

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M4_carbine The M4 carbine is a family of firearms that was derived from earlier carbine versions of the M16 rifle, which was in turn derived from the original AR-15 rifle that Eugene Stoner designed and ArmaLite manufactured. The M4 is a shorter and lighter variant of the M16A2 assault rifle. It is a gas-operated, magazine-fed, selective fire, shoulder-fired weapon with a telescoping stock and 14.5 in (370 mm) barrel to ease close quarters combat. Like the rest of the M16 family, it fires the .223 caliber, or 5.56 mm NATO round. The M4 has selective fire options including semi-automatic and three-round burst (like the M16A2 and M16A4), while the M4A1 has the capability to fire fully automatic instead of three-round burst (like the M16A1 and M16A3). The carbine is also capable of mounting an M203 grenade launcher (the M203A1 with a 9-inch barrel as opposed to the standard 12-inch barrel of the M203 used on the M16 series) as well as its successor, the M320 grenade launcher. The M4 carbine is heavily used by the U.S military. It will eventually replace the M16 rifle for most combat units in the United States Army. The winner of the Individual Carbine competition was to supplement the M4 carbine in U.S. Army service; all other services will continue using the M4 carbine and M16 rifles. The Army cancelled the Individual Carbine competition without selecting a replacement rifle and instead plans to equip soldiers with the improved M4A1

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M4_carbine The M4 carbine is a family of firearms that was derived from earlier carbine versions of the M16 rifle, which was in turn derived from the original AR-15 rifle that Eugene Stoner designed and ArmaLite manufactured. The M4 is a shorter and lighter variant of the M16A2 assault rifle. It is a gas-operated, magazine-fed, selective fire, shoulder-fired weapon with a telescoping stock and 14.5 in (370 mm) barrel to ease close quarters combat. Like the rest of the M16 family, it fires the .223 caliber, or 5.56 mm NATO round. The M4 has selective fire options including semi-automatic and three-round burst (like the M16A2 and M16A4), while the M4A1 has the capability to fire fully automatic instead of three-round burst (like the M16A1 and M16A3). The carbine is also capable of mounting an M203 grenade launcher (the M203A1 with a 9-inch barrel as opposed to the standard 12-inch barrel of the M203 used on the M16 series) as well as its successor, the M320 grenade launcher. The M4 carbine is heavily used by the U.S military. It will eventually replace the M16 rifle for most combat units in the United States Army. The winner of the Individual Carbine competition was to supplement the M4 carbine in U.S. Army service; all other services will continue using the M4 carbine and M16 rifles. The Army cancelled the Individual Carbine competition without selecting a replacement rifle and instead plans to equip soldiers with the improved M4A1

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M4_carbine The M4 carbine is a family of firearms that was derived from earlier carbine versions of the M16 rifle, which was in turn derived from the original AR-15 rifle that Eugene Stoner designed and ArmaLite manufactured. The M4 is a shorter and lighter variant of the M16A2 assault rifle. It is a gas-operated, magazine-fed, selective fire, shoulder-fired weapon with a telescoping stock and 14.5 in (370 mm) barrel to ease close quarters combat. Like the rest of the M16 family, it fires the .223 caliber, or 5.56 mm NATO round. The M4 has selective fire options including semi-automatic and three-round burst (like the M16A2 and M16A4), while the M4A1 has the capability to fire fully automatic instead of three-round burst (like the M16A1 and M16A3). The carbine is also capable of mounting an M203 grenade launcher (the M203A1 with a 9-inch barrel as opposed to the standard 12-inch barrel of the M203 used on the M16 series) as well as its successor, the M320 grenade launcher. The M4 carbine is heavily used by the U.S military. It will eventually replace the M16 rifle for most combat units in the United States Army. The winner of the Individual Carbine competition was to supplement the M4 carbine in U.S. Army service; all other services will continue using the M4 carbine and M16 rifles. The Army cancelled the Individual Carbine competition without selecting a replacement rifle and instead plans to equip soldiers with the improved M4A1

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry M249 From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M249_light_machine_gun The M249 light machine gun (LMG), previously designated the M249 Squad Automatic Weapon (SAW), and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal (FN). The M249 is manufactured in the United States by the local subsidiary FN Manufacturing LLC in South Carolina and is widely used in the U.S. Armed Forces. The weapon was introduced in 1984 after being judged the most effective of a number of candidate weapons to address the lack of automatic firepower in small units. The M249 provides infantry squads with the heavy volume of fire of a machine gun combined with accuracy and portability approaching that of a rifle. The M249 is gas operated and air-cooled. It has a quick-change barrel, allowing the gunner to rapidly replace an overheated or jammed barrel. A folding bipod is attached near the front of the gun, though an M192 LGM tripod is also available. It can be fed from both linked ammunition and STANAG magazines, like those used in the M16 and M4. This allows the SAW gunner to use rifleman's magazines as an emergency source of ammunition in the event that he runs out of linked rounds. However, this will often cause malfunctions where the magazine spring has difficulty feeding rounds quickly enough to match the SAW's high cyclic rate. M249s have seen action in every major conflict involving the United States since the U.S. invasion of Panama in 1989. Soldiers are generally satisfied with the weapon's performance, though there have been reports of clogging with dirt and sand. Due to the weight and age of the weapon, the United States Marine Corps is fielding the M27 Infantry Automatic Rifle with plans to partially replace the M249 in Marine Corps service. The M249 is sometimes incorrectly referred to as a "Squad Assault Weapon".

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry M249 From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M249_light_machine_gun The M249 light machine gun (LMG), previously designated the M249 Squad Automatic Weapon (SAW), and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal (FN). The M249 is manufactured in the United States by the local subsidiary FN Manufacturing LLC in South Carolina and is widely used in the U.S. Armed Forces. The weapon was introduced in 1984 after being judged the most effective of a number of candidate weapons to address the lack of automatic firepower in small units. The M249 provides infantry squads with the heavy volume of fire of a machine gun combined with accuracy and portability approaching that of a rifle. The M249 is gas operated and air-cooled. It has a quick-change barrel, allowing the gunner to rapidly replace an overheated or jammed barrel. A folding bipod is attached near the front of the gun, though an M192 LGM tripod is also available. It can be fed from both linked ammunition and STANAG magazines, like those used in the M16 and M4. This allows the SAW gunner to use rifleman's magazines as an emergency source of ammunition in the event that he runs out of linked rounds. However, this will often cause malfunctions where the magazine spring has difficulty feeding rounds quickly enough to match the SAW's high cyclic rate. M249s have seen action in every major conflict involving the United States since the U.S. invasion of Panama in 1989. Soldiers are generally satisfied with the weapon's performance, though there have been reports of clogging with dirt and sand. Due to the weight and age of the weapon, the United States Marine Corps is fielding the M27 Infantry Automatic Rifle with plans to partially replace the M249 in Marine Corps service. The M249 is sometimes incorrectly referred to as a "Squad Assault Weapon".

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry M249 From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M249_light_machine_gun The M249 light machine gun (LMG), previously designated the M249 Squad Automatic Weapon (SAW), and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal (FN). The M249 is manufactured in the United States by the local subsidiary FN Manufacturing LLC in South Carolina and is widely used in the U.S. Armed Forces. The weapon was introduced in 1984 after being judged the most effective of a number of candidate weapons to address the lack of automatic firepower in small units. The M249 provides infantry squads with the heavy volume of fire of a machine gun combined with accuracy and portability approaching that of a rifle. The M249 is gas operated and air-cooled. It has a quick-change barrel, allowing the gunner to rapidly replace an overheated or jammed barrel. A folding bipod is attached near the front of the gun, though an M192 LGM tripod is also available. It can be fed from both linked ammunition and STANAG magazines, like those used in the M16 and M4. This allows the SAW gunner to use rifleman's magazines as an emergency source of ammunition in the event that he runs out of linked rounds. However, this will often cause malfunctions where the magazine spring has difficulty feeding rounds quickly enough to match the SAW's high cyclic rate. M249s have seen action in every major conflict involving the United States since the U.S. invasion of Panama in 1989. Soldiers are generally satisfied with the weapon's performance, though there have been reports of clogging with dirt and sand. Due to the weight and age of the weapon, the United States Marine Corps is fielding the M27 Infantry Automatic Rifle with plans to partially replace the M249 in Marine Corps service. The M249 is sometimes incorrectly referred to as a "Squad Assault Weapon".

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry M249 From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M249_light_machine_gun The M249 light machine gun (LMG), previously designated the M249 Squad Automatic Weapon (SAW), and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal (FN). The M249 is manufactured in the United States by the local subsidiary FN Manufacturing LLC in South Carolina and is widely used in the U.S. Armed Forces. The weapon was introduced in 1984 after being judged the most effective of a number of candidate weapons to address the lack of automatic firepower in small units. The M249 provides infantry squads with the heavy volume of fire of a machine gun combined with accuracy and portability approaching that of a rifle. The M249 is gas operated and air-cooled. It has a quick-change barrel, allowing the gunner to rapidly replace an overheated or jammed barrel. A folding bipod is attached near the front of the gun, though an M192 LGM tripod is also available. It can be fed from both linked ammunition and STANAG magazines, like those used in the M16 and M4. This allows the SAW gunner to use rifleman's magazines as an emergency source of ammunition in the event that he runs out of linked rounds. However, this will often cause malfunctions where the magazine spring has difficulty feeding rounds quickly enough to match the SAW's high cyclic rate. M249s have seen action in every major conflict involving the United States since the U.S. invasion of Panama in 1989. Soldiers are generally satisfied with the weapon's performance, though there have been reports of clogging with dirt and sand. Due to the weight and age of the weapon, the United States Marine Corps is fielding the M27 Infantry Automatic Rifle with plans to partially replace the M249 in Marine Corps service. The M249 is sometimes incorrectly referred to as a "Squad Assault Weapon".

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry M240B From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M240_machine_gun The M240, officially Machine Gun, 7.62mm, M240, is the US military designation for the FN MAG (Mitrailleuse d'Appui Général, meaning General Purpose Machine Gun), a family of belt-fed, gas-operated medium machine guns firing the 7.62×51mm NATO cartridge. The M240 has been used by the United States Armed Forces since the late-1970s. It is used extensively by infantry, most often rifle companies; as well as ground vehicles; watercraft; and aircraft. Despite not being the lightest medium machine gun in service, it is highly regarded for reliability, and its standardization among NATO members is also seen as a major advantage. All variants are fed from disintegrating belts, and are capable of firing most types of 7.62 mm (.308) NATO ammunition. M240 variants can use non-disintegrating belts (following replacement of a few easily swappable parts). There are significant differences in weight and some features among some versions which restrict interchangeability of parts. The M240s used by the US military are currently manufactured by FN Manufacturing, a US-based branch of FN Herstal. The M240B and M240G (see Variants section) are usually fired from an integrated bipod, a vehicular mount, an M192 tripod that is mostly used by the U.S. Army; and the M122 tripod (a slightly updated M2 tripod) that is mostly used by the U.S. Marine Corps.

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry M249 From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M249_light_machine_gun The M249 light machine gun (LMG), previously designated the M249 Squad Automatic Weapon (SAW), and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal (FN). The M249 is manufactured in the United States by the local subsidiary FN Manufacturing LLC in South Carolina and is widely used in the U.S. Armed Forces. The weapon was introduced in 1984 after being judged the most effective of a number of candidate weapons to address the lack of automatic firepower in small units. The M249 provides infantry squads with the heavy volume of fire of a machine gun combined with accuracy and portability approaching that of a rifle. The M249 is gas operated and air-cooled. It has a quick-change barrel, allowing the gunner to rapidly replace an overheated or jammed barrel. A folding bipod is attached near the front of the gun, though an M192 LGM tripod is also available. It can be fed from both linked ammunition and STANAG magazines, like those used in the M16 and M4. This allows the SAW gunner to use rifleman's magazines as an emergency source of ammunition in the event that he runs out of linked rounds. However, this will often cause malfunctions where the magazine spring has difficulty feeding rounds quickly enough to match the SAW's high cyclic rate. M249s have seen action in every major conflict involving the United States since the U.S. invasion of Panama in 1989. Soldiers are generally satisfied with the weapon's performance, though there have been reports of clogging with dirt and sand. Due to the weight and age of the weapon, the United States Marine Corps is fielding the M27 Infantry Automatic Rifle with plans to partially replace the M249 in Marine Corps service. The M249 is sometimes incorrectly referred to as a "Squad Assault Weapon".

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry M240B From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M240_machine_gun The M240, officially Machine Gun, 7.62mm, M240, is the US military designation for the FN MAG (Mitrailleuse d'Appui Général, meaning General Purpose Machine Gun), a family of belt-fed, gas-operated medium machine guns firing the 7.62×51mm NATO cartridge. The M240 has been used by the United States Armed Forces since the late-1970s. It is used extensively by infantry, most often rifle companies; as well as ground vehicles; watercraft; and aircraft. Despite not being the lightest medium machine gun in service, it is highly regarded for reliability, and its standardization among NATO members is also seen as a major advantage. All variants are fed from disintegrating belts, and are capable of firing most types of 7.62 mm (.308) NATO ammunition. M240 variants can use non-disintegrating belts (following replacement of a few easily swappable parts). There are significant differences in weight and some features among some versions which restrict interchangeability of parts. The M240s used by the US military are currently manufactured by FN Manufacturing, a US-based branch of FN Herstal. The M240B and M240G (see Variants section) are usually fired from an integrated bipod, a vehicular mount, an M192 tripod that is mostly used by the U.S. Army; and the M122 tripod (a slightly updated M2 tripod) that is mostly used by the U.S. Marine Corps.

Video by Sgt. Maj. James Denton 1st Battalion, 158th Infantry M240B From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/M240_machine_gun The M240, officially Machine Gun, 7.62mm, M240, is the US military designation for the FN MAG (Mitrailleuse d'Appui Général, meaning General Purpose Machine Gun), a family of belt-fed, gas-operated medium machine guns firing the 7.62×51mm NATO cartridge. The M240 has been used by the United States Armed Forces since the late-1970s. It is used extensively by infantry, most often rifle companies; as well as ground vehicles; watercraft; and aircraft. Despite not being the lightest medium machine gun in service, it is highly regarded for reliability, and its standardization among NATO members is also seen as a major advantage. All variants are fed from disintegrating belts, and are capable of firing most types of 7.62 mm (.308) NATO ammunition. M240 variants can use non-disintegrating belts (following replacement of a few easily swappable parts). There are significant differences in weight and some features among some versions which restrict interchangeability of parts. The M240s used by the US military are currently manufactured by FN Manufacturing, a US-based branch of FN Herstal. The M240B and M240G (see Variants section) are usually fired from an integrated bipod, a vehicular mount, an M192 tripod that is mostly used by the U.S. Army; and the M122 tripod (a slightly updated M2 tripod) that is mostly used by the U.S. Marine Corps.